Effect of Sn addition on improving the stability of Ni-Ce0.8Sm0.2O1.9 anode material for solid oxide fuel cells fed with dry CH4

Abstract

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Enhanced Thermocatalytic Stability by Coupling Nickel Step Sites with Nitrogen Heteroatoms for Dry Reforming of Methane

“…The effect of blocking step-edge sites of the nickel crystal surface on the rate of carbon deposition reaction and carbon gasification reaction has been investigated. Promoters including Ru, Au, Ag, , and Sn − can block the under-coordinated sites such as step-edge sites of nickel surfaces via formation of surface alloy and further restrain the nucleation of carbon species. In addition, the introduction of non-metallic heteroatoms can also cover the step-edge sites.…”

ZnO-promoted surface diffusion on NiO-Ce0.8Sm0.2O1.9 anode for solid oxide fuel cell

“…Noble metals such as Ru and Pd were used in early works, which upgraded the performance of Ni-based anode with CH4 as fuel [13,14]. Based on experimental and theoretical calculation results, Schwank and co-workers [15][16][17] demonstrated that Sn depressed the formation of C-C bonds on Ni and improved the stability of the anode in CH4 atmosphere. Yoon and Manthiram [18] added W in Ni-Ce1-xGdxO2-0.5x anode, which formed hydrogen tungsten bronze (HxWO3) in a humid atmosphere, providing hydroxyl groups to remove carbon on Ni surface.…”

Achieving performance and longevity with butane-operated low-temperature solid oxide fuel cells using low-cost Cu and CeO2 catalysts

“…4b, with data given in Table S6. † Previously reported data can be categorized based on three different strategies: Ni-alloy anodes, 38,39,[87][88][89][90] the addition of a catalyst layer on top of the anode, 48,[91][92][93] and basic oxide addition to the anode. 94,95 Our strategy involves coupling a Ni-Cu alloy at the electrochemical interface and using an AS layer as the catalyst layer via incorporating CeO 2 nanoparticles.…”

“…7). 38,39,[88][89][90][93][94][95] Carbon deposition is considered to be the main cause of cell performance degradation. The primary reason for Cu-Ce-cell outlasting ref-cell is its ability to suppress carbon deposition, as suggested by the powder catalyst tests (see above).…”